21352334245564 has 48 divisors (see below), whose sum is σ = 44953980977920. Its totient is φ = 8669041251840.

The previous prime is 21352334245531. The next prime is 21352334245633. The reversal of 21352334245564 is 46554243325312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13591084 + ... + 15080524.

Almost surely, 2^{21352334245564} is an apocalyptic number.

It is an amenable number.

21352334245564 is an abundant number, since it is smaller than the sum of its proper divisors (23601646732356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21352334245564 is a wasteful number, since it uses less digits than its factorization.

21352334245564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516418 (or 1516416 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 49.

The spelling of 21352334245564 in words is "twenty-one trillion, three hundred fifty-two billion, three hundred thirty-four million, two hundred forty-five thousand, five hundred sixty-four".